Pneumatically operated mending device



Aug. 3, 1948.

M. VITOUX PNEUMATICALLY OPERATED MENDING DEVICE Filed Nov. 20, 1946 INVENTOR.

MAECEL v/Toux BY Patented Aug. 3, 1948 PNEUMATICALLY OPERATED MENDING DEVICE Marcel Vitoux, Paris, France, assignor to American Vitos Company, Inc., New York, N. Y., a corporation of New York Application November 20, 1946, Serial No. 711,165

In France June 22, 1944 Section 1, Public Law 690, August 8, 1946 Patent expires June 22, 196i ing the smoothness of operation of the device.

,Another object of the invention is the provision of means which may be directly mounted on the piston stem or needle which will either absorb. collect or deflect any lubricatin oil dropped thereon from the piston.

Another object of the invention is to produce a device of the character described in which the maximum simplicity of construction and operation is secured.

Other objects and advantages will appear as the nature of the improvements is better understood, the invention consisting substantially in the novel arrangement and oo-relation of parts herein fully described, and illustrated in the accompanying drawings, wherein similar reference characters are used to denote corresponding parts throughout'the several views, and then finally pointed out and specifically defined and indicated in the appended claims.

The disclosure made the basis of exemplifying the present inventive concept suggests a practical embodiment thereof, but the invention is not to be restricted to the exact details of this disclosure, and the latter, therefore, is to be understood from an illustrative, rather than a restrictive standpoint.

In carrying out the objects of the present invention, it was found advantageous to mount an absorbent washer unit on the needle below the piston to receive and absorb any drops of oil which may trickle down said needle from said piston, It was also found advantageous to provide an absorbent packing washer directly below the piston to absorb and thereby reduce to a minimum the leakage of the lubricant below the piston. Furthermore a sleeve is provided near the bottom of the casing to absorb any lubricant which may trickle down the inner walls of the cylinder or casing, before such lubricant reaches the needle.

In another form of the invention it was found desirable to provide a cupel for collecting any drops of oil from the piston, and in still another form a deflector is provided for deflecting the oil 6 Claims. (Cl. 66-15) towards or on to the walls to be absorbed by the sleeve aforementioned.

The invention will appear more clearly from the following detailed description when taken in connection with the accompanying drawings in whichi Figure l a longitudinal sectional view through a reweaving device made in accordance with the present invention;

Figure 2 is a sectional view taken on line 2-2 of Figure 1;

Figure 3 is a fragmental detail view of a modified form of the inventiomand Figure 4 is a similar view to Figure 3 of a still further modified form.

Referring now to the drawings in detail, the numeral 5 indicates the cylinder or casing of the knitting device which is provided near the top thereof with a collar or finger piece 6 by which it is held by the operator in an oblique position with respect to the article being repaired. Located within the finger piece 6 and removably secured to the cylinder is a nozzle 1 for attaching the device to a source of compressed air by means of a tube orhose not shown.

Slidably positioned in the upper bore 8 is a cup shaped leather piston 9 centrally perforated to receive the enlarged shoulder portion In of a stud l I provided with a head 12. A metal washer i3 is secured to the stud shoulder l0 beneath the .base of the cup shaped piston 9 by upsetting the shoulder It at M and forming a rivet of same.

Beneath the metal washer 13 there is a packing Washer l5 made of absorbent material, said washer being of the same diameter at the inner bore 8 of the cylinder 5. A metal washer l3a. is riveted in place by upsetting the end of a shoulder it upon which the said washer I 3a is positioned.

With the above construction the piston 9 is clamped between the head l2 and washer l3 and the packing washer I5 is clamped between the washers l3 and 13a, all of which elements are either mounted on or unitary with the stud H which at the lower end thereof is provided with a hub or boss ll. The said hub l1 and body of the stud II is provided with a central screw threaded bore into which is threaded the upper end 18 of the reweaving needle [9 which forms the piston rod orstem of the device.

The needle l9 passes through a bushing 20 at the bottom of the cylinder, the said bushing being self lubricating and provided with a rectangular slot or opening 21 which corresponds to the cross-section of the needle I9. The said bushing is maintained in a cylinder bore 22 by means of a set screw 23 which is drawn up against the circumference of said bore. A hole 24 provides access to the said screw for loosening ortightening same.

It is well known that by making the needle guide bushing of materials having selflubri-cat-, ing qualities, the use of oil as a lubricant maybe dispensed with at that point of the device. flowever. the piston requires continuous lubrication, and for this purpose oil or other lubricant is poured into the bore 8 above the piston 9. Snch lubricant Will to a great extent be maintained above the piston by the packing washer l5. However some of the lubricant will find .its Waytoa position below said packing washer due to the oscillations of the piston and packing washer and may drop upon the needle l9, seep 'throughlthe bushing 2i) and then fall upon the article being repaired. The oscillation of the piston-is caused by the air pressure through the nozzle 1 and the-return pressure of the spring 25, A shock absorbing spring 28 is provided above the piston.

In order to obviate this undesirable feature, there is ro ded an abs rb n unit 12'? whic comprises a plurality fabsorbent washers tigh't- 1y maintained on the needle l9 below the piston mechanism. It will be seen that if any oil drops from the said piston mechanism on to the needle, same will be absorbed by the said absorbing unit 2?. Likewise any lubricant which may find its Way down along the inner walls or surfaces of the bores 8 and 22 will be absorbed by an absorbent sleeve 28 which fits tightly against-thebore 22'but is provided with an opening 29 considerably larger than the greatest thickness of the needle.

Instead of the absorbing unit 21, one or more cupels 36 shown in Figure 3 may be provided on the needle 59 for collecting any drops of oil which may drop from the piston.

This latter means maybe replaced if desirable by a deflecting member 3| shown in "Figure 4. In this last form any oil which may drop on the deflecting member 3 l will b de fiectedagainstthe walls or" the bore 22 and be absorbed bythe sleeve lit. It to be, understood that any time desirable the needle, guiding bushing and absorbing-collectin and/or deflecting means maybe removed and replaced by other such element.

From the foregoingit will be seen that the-present invention provides means for effectively preventingthe soiling of articles being mended, by lubricating'oil or the like, by means of labsorbtion, collection or defiectionor by a combination of same.

It is apparentthat wide variations andmodiilcations may be made without departing from the scope of the invention as set forth'in'the claims, all oi which variations andmodifications are to be included within the scope-of the present invention.

What is claimed is:

1. In a pneumatically operated device for mending knitted goods, said deviceinclud-ing a 4 cylinder and a reciprocating piston in said cylinder, the said cylinder being adapted to contain liquid lubricant above the piston, a mending needle connected to the piston and depending therefrom downwardly and outwardly of the cylinder, and means carried by said needle below the piston for preventing any lubricant which may drop onto the needle from seeping therefrom out- Iwardly of the cylinder to the article bein mend- 2, a pneumatically operated device for mending knitted goods, said device including a cylinder and a reciprocating piston in said cylinder, the said cylinder being adapted to contain liquid :lubricant above the piston, a mending needle connected to the piston and depending therefrom downwardly and outwardly of the cylinder and means carried by said needle below the piston for preventing any lubricant which may drop onto the needle from seeping therefrom ou war of h l d t h artic e be men d S means m isin a ale f ins iorabsorbin such droppingv lubricant.

3. In a pneumatically operated device igr mending k t ds id de ic including a lin s c pr c ti Pis on seide l der, the saidcylinder being adapted tocpiltain liquid lubricant above the piston, a needle connected to the piston anddepengi 1g therefrom downwardly and outwardlyof .tli'e cylinder, and means carried by saidneedle b elow the vpiston for preventing any lubricant which may-drop onto-the needle from seeping therefrom outwardly of the cylinder to the article being a mended, said means comprising at least-one cupel for collecting such dropping lubricant.

l. .In a pneumatically operated device .fgr mending knitted goods, said deviceincluding a cylinder and a reciprocating piston in said cylin- .cler, the said cylinder being adaptedto captain i u d lub c above th is on a mendin needle connected to the piston ,anddependln g therefrom downwardly and o'utwardlypf e c nd a e dle uiriinaliu hins a they!) f the linde l and 'a scrbe l SEQ 91 c tact wi h h i ne s r ac of th c lind t.

. i the lien central hole through which the needle passesthe dia et o a o ein la than lar est cross section of the needle.

5. A deviceaccording to claim 4 whei ein the needle is provided with means below the piston for deflecting any lubricant that may drop there- 0 rd th inner ii iace of he lind r 120.19 absorbed by the said sleeve.

v c a rd n to c imn ianslabs rb means. a h bo om o th c inde incqniact wi h. the inner r a the eo bu ou o c ntac with the needle to absorb any lubricant wliich may run down said inner surface of the cyli M and P ts s e m. rea hin he n le R E VIT 'X: 

